Physics definitions

• Speed

  How fast an object is moving/travelling in a certain time frame.
• Acceleration

  Change (increase/decrease) in speed.
• Force

  Push, pull or twist.
• Inertia

  Tendency of any object to resist any change in its motion.
• Mass

  The amount of matter in any object. It can be measured in kilograms.
• Weight

  The force exerted on an object due to gravity.
• Gravity

  The force of attraction by a planet on an object.
• Displacement

  Measure of how far and in what direction an object is from its starting point.